ISO 14343-2025 PDF

Full title and description

St ISO 14343-2025 — Welding consumables — Wire electrodes, strip electrodes, wires and rods for arc welding of stainless and heat-resisting steels — Classification. This international standard defines classification systems for wire and strip electrodes, wires and rods intended for a range of arc-welding processes on stainless and heat‑resisting steels, using either a nominal-composition based system (System A) or an alloy-type based system (System B).

Abstract

Specifies requirements for the classification of wire electrodes, strip electrodes, wires and rods for gas-shielded metal arc welding, gas tungsten arc welding, plasma arc welding, submerged arc welding, electroslag welding and laser beam welding of stainless and heat‑resisting steels. The document is a combined specification allowing classification by nominal composition (system A) or by alloy type (system B); clauses and tables carry suffixes (A or B) to indicate applicability.

General information

• Status: Published (International Standard).
• Publication date: January 2025 (Edition 4, 2025).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.160.20 (Welding consumables).
• Edition / version: Edition 4 (2025).
• Number of pages: 20 pages (ISO edition metadata).

Reference: official ISO bibliographic information for ISO 14343:2025.

Scope

Applies to classification (labelling and designation) of wire electrodes, strip electrodes, wires and rods intended for fusion/arc welding of stainless and heat‑resisting steels across multiple arc processes. The standard defines two complementary classification approaches (system A: nominal composition; system B: alloy type) and identifies which clauses/tables apply to each system or to both. It is intended to standardize how welding consumables for stainless/heat‑resisting steels are designated for procurement, testing and specification.

Key topics and requirements

• Classification by chemical composition (nominal composition system A) and by alloy type (system B).
• Designation rules and labelling suffixes to show applicability to system A or B (e.g., ISO 14343‑A, ISO 14343‑B).
• Coverage of multiple welding processes: GMAW, GTAW, PAW, SAW, ESW and laser beam welding.
• Tables and clauses specifying compositional limits and allowable variants for typical stainless and heat‑resisting filler materials.
• Harmonization with regional adoptions (EN/BSI/other national adoptions) for consistent procurement and testing.

Typical use and users

Used by welding engineers, material specification writers, procurement specialists, welding consumables manufacturers, testing laboratories and certification bodies involved in specifying or verifying filler metals for stainless and heat‑resisting steels. It is applied when selecting filler materials for fabrication, repair and manufacturing where consistent classification and traceability of consumables is required.

Related standards

Related documents include earlier editions of ISO 14343 (2002, 2009, 2017) which were revised and superseded as part of the lifecycle of this standard, and other ISO welding-consumable classification standards such as ISO 14341 (classification of solid wire electrodes for non‑alloy and fine‑grained steels) and additional process‑specific ISO standards for filler metals. National and regional adoptions (EN ISO 14343 / BS EN ISO 14343, etc.) align this ISO text with European and national implementations.

Keywords

welding consumables; wire electrodes; strip electrodes; welding wires; filler rods; stainless steel; heat‑resisting steel; classification; GMAW; GTAW; plasma arc; submerged arc; electroslag; laser beam; ISO 14343; system A; system B.

FAQ

Q: What is this standard?

A: ISO 14343:2025 is an international standard that specifies classification and designation rules for wire and strip electrodes, wires and rods used for arc welding of stainless and heat‑resisting steels.

Q: What does it cover?

A: It covers classification schemes (nominal composition and alloy‑type), designation formats, and the applicability of clauses/tables to each system for consumables used in GMAW, GTAW, PAW, SAW, electroslag and laser beam welding of stainless and heat‑resisting steels.

Q: Who typically uses it?

A: Welding engineers, materials purchasers, consumable manufacturers, test laboratories and conformity assessment bodies use the standard to specify and verify correct filler materials for stainless and heat‑resisting steel welding.

Q: Is it current or superseded?

A: ISO 14343:2025 is the current published edition (Edition 4, published January 2025). It supersedes earlier editions (including the 2009 and 2017 versions) as part of the standard’s lifecycle.

Q: Is it part of a series?

A: Yes — it is part of the family of ISO standards covering welding consumables and filler materials (for example ISO 14341 for solid wires for non‑alloy steels, ISO process‑specific filler metal standards and other consumable classification documents). Regional/adopted versions (EN ISO 14343 / BS EN ISO 14343) implement the text for national/regional use.

Q: What are the key keywords?

A: welding consumables; electrodes; filler metals; stainless steels; heat‑resisting steels; classification; nominal composition; alloy type; GMAW; GTAW; SAW.